There is little evidence that other animals judge the appropriateness of actions that do not directly affect themselves.

To endow animals with human emotions has long been a scientific taboo. But if we do not, we risk missing something fundamental, about both animals and us.

The enemy of science is not religion... . The true enemy is the substitution of thought, reflection, and curiosity with dogma.

If we look straight and deep into a chimpanzee's eyes, an intelligent self-assured personality looks back at us. If they are animals, what must we be?

If you ask anyone, what is morality based on? These are the two factors that always come out: One is reciprocity, … a sense of fairness, and the other one is empathy and compassion.

Darwin wasn't just provocative in saying that we descend from the apes - he didn't go far enough. We are apes in every way, from our long arms and tailless bodies to our habits and temperament.

Perhaps it's just me, but I am wary of any persons whose belief system is the only thing standing between them and repulsive behavior.

We are territorial, power-hungry and even more brutal than chimpanzees.

The possibility that empathy resides in parts of the brain so ancient that we share them with rats should give pause to anyone comparing politicians with those poor, underestimated creatures.

We are by far the most contradictory of all primates. An animal with this much internal conflict has never lived on this earth.

Socialism cannot function, because its economic reward structure is contrary to human nature.

War is a horribly fascinating thing.

If only it felt like an academic exercise when she kissed him, instead of a soul-drowning tsunami of want and need.

Treat your friends as you do your pictures and place them in their best light.

The oldest book I have is a treatise on architecture from the 17th century.

There's nothing wrong with things taking time.

I was born on Delaware Street. We have never desired another home.

Whenever this person comes (the right girl) I'm sure you'll feel something you know

There is nothing more seductive — and dangerous — than being listened to.

If a well-constituted individual refrains from blazoning aught amiss or calamitous in his family, a nation in the like circumstance may without reproach be equally discreet.

The measure of love is to love without measuring.